a = 4
# [5, 15]
if 15 >= a >= 5:
    print(1)
else:
    print(0)
    
    
# [5, 15]
if 5 <= a <= 15:
    print(1)
else:
    print(0)
    
# [5, 15]
if 15 >= a and a >= 5:
    print(1)
else:
    print(0)
    
# a = 20
# 5 <= a <= 15  C\C++ 真
# 5 <= a <= 15  Python 假